BTU Output of Different Types of Wood

Highest BTU Ratings

• The harder the wood, the more heat you will get. White oak, madrone, black birch and hard maple are four of the most efficient types of wood, according to Thelograck.com. Madrone tops the list with a rating of 30 million BTU per cord. "Aspen builds a hot fire, which helps clean the chimney," advises Energysavers.gov.

Lowest BTU Ratings

• Stay away from pine, hemlock and cedar. While they offer nice aromas and ignite easily, they have the lowest output according to Stoves-only.com.

Seasoned Firewood

• It is important to burn only seasoned wood. Green wood, or wood that has not had a chance to dry out after it has been split, will adversely affect your fireplace or stove and will result in reduced efficiency. Make sure you give your firewood at least six months to cure before burning it.